If the goal of a retrocausal model is to explain Bell inequality violations by correlating hidden parameters with future settings, such that \(P(\lambda |\alpha ,\beta )\ne P(\lambda )\) , then either of these accounts of retrocausation are arguably reasonable. While some retrocausal models of conventional Bell correlations must be solved all-at-once [1]}, [2]}, others seem to contain both forward- and reverse-dynamical calculations [3]}. Either way, the key is that the future settings have some adjustable constraint on the past, providing a mechanism to violate Bell Statistical Independence.
